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For my commute I set the radio to between 91.1 and 93.3. This range tends to be where the default for most Bluetooth and AUX radio broadcasters ends up being set.

Arguably an invasion of privacy, but it turns fellow commuters into DJs. I’ve discovered some good music this way.

Also lots of static.




Are you saying that if I turn on my phone's radio and set it between 91.1 and 93.3, I'd be able to hear what other people are listening to? Could you elaborate?


Nowadays, most new cars offer at least one way of connecting to an external playback device, via Bluetooth or wired auxiliary input or both. A decade ago, though, this was more of a premium feature. Back then, if you wanted to connect your music player or smart phone to your basic stereo, the simplest and least invasive way was a device that plugged into the headphone jack of your device (or alternatively connected to it via Bluetooth) and which broadcast a very low power FM signal. You would the tune your car stereo to the matching frequency, and your device's audio would be piped through the car's speakers. Usually the transmitter provided a way to choose from a list of frequencies so you could pick one not used by any local radio stations. When operating in good conditions, if another car was driving down the road next to you, they could also tune to the same frequency and hear your playback.




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